A.應(yīng)計(jì)算到小數(shù)點(diǎn)后1位 B.應(yīng)計(jì)算到小數(shù)點(diǎn)后2位 C.應(yīng)計(jì)算到小數(shù)點(diǎn)后3位 D.應(yīng)計(jì)算到小數(shù)點(diǎn)后4位
A.15 B.20 C.25 D.30
A.8mm B.10mm C.12mm D.16mm